JML-12X Material Lift

JET JML-12X Material Lift — 650 lb Capacity, 12 ft. Lift Height for Contractors and Trades Professionals

The JET JML-12X is a heavy-duty manual material lift designed for contractors and trades professionals who need to raise and position loads up to 650 lbs at heights up to 12 ft. (13 ft., 1 in. with forks mounted up). Built around a 2-section telescoping mast, the JML-12X operates in both Standard Lift Mode and Counterbalance Lift Mode, giving operators flexibility when working near walls or obstructions. The unit ships with a hand-crank winch that also accepts a drill drive input, enabling faster cycle times on the job site.

Technical Specifications

Stowed / Transport Dimensions

The JML-12X's 2-section mast and 338 lb base weight make it the most maneuverable model in the JML-X series, while still sharing the same 650 lb capacity and winch specification as the larger JML-18X and JML-24X. Contractors who need a compact footprint — particularly the 2 ft., 2 in. lifting-mode width — will find the JML-12X easier to navigate through doorways and tight interior spaces than the wider models in the lineup.

Key Features & Benefits

Dual Operating Modes — Standard and Counterbalance

The JML-12X supports both Standard Lift Mode (legs forward) and Counterbalance Lift Mode (legs rearward), allowing operators to position loads close to a forward wall or obstruction without sacrificing stability. Counterbalance mode requires the JET counterbalance weight assembly and extends the unit length to 8 ft., 8 in. to maintain safe balance.

Drill-Drive Winch with 24-to-1 Gear Ratio

The winch accepts a standard 3/4 in. 6-point socket for drill-powered operation, with a 24-to-1 gear ratio and a maximum input speed of 500 RPM (no load). This allows faster raising and lowering cycles compared to hand-cranking alone, reducing operator fatigue on repetitive lifts. Maximum drill torque is rated at 1,400 in-lbs to protect the cable and winch components.

Reversible Lifting Forks

The 17 x 28.25 in. lifting forks can be mounted up or down on the carriage, providing two maximum lift height options — 13 ft., 1 in. (forks up) or 11 ft., 4 in. (forks down) — without any additional hardware. This flexibility lets operators match fork orientation to the load geometry on site.

Mast Safety Brake System

The mast incorporates a safety brake system that activates automatically if the cable breaks under load, preventing an uncontrolled drop of the elevated load. The brake system can be reset following the procedure in the Operating Instructions and Parts Manual, minimizing downtime after an incident.

Forklift Pockets for Job-Site Transport

Integrated forklift pockets (5.75 x 1.75 in. internal dimensions) allow the unit to be picked up and repositioned by a forklift when in horizontal transport mode, eliminating the need to manually roll the 338 lb unit across uneven job-site terrain.

Rear Cable Guard Shield

A removable rear cable guard shield protects the cable and rear mast pulley from job-site debris and incidental contact during operation. The shield is removed with 1/2 in. wrenches or sockets when cable service is required, keeping maintenance straightforward.

User Manual Storage Tube

The operating instructions manual stores in a dedicated tube located at the bottom rear of the mast, keeping documentation on the unit and accessible to operators at all times — a practical detail for job sites where paperwork is easily misplaced.

Common Applications

Interior Drywall and Panel Installation

The JML-12X's 2 ft., 2 in. lifting-mode width and 12 ft. lift range make it well suited for raising drywall sheets, ceiling panels, and similar flat stock to installation height in interior spaces.

HVAC Equipment Positioning

Contractors can use the 650 lb capacity and reversible forks to lift and position HVAC units, ductwork sections, and air handlers to overhead mounting locations up to 13 ft., 1 in.

Electrical and Mechanical Overhead Work

Electricians and mechanical contractors can use the lift to raise conduit bundles, junction boxes, and mechanical components to ceiling-level work areas, keeping loads stable and hands free for installation.

Counterbalance Mode — Wall-Adjacent Lifts

When working close to a forward wall, the counterbalance lift mode (with the JET counterbalance weight assembly) allows the operator to position the mast near the wall and raise loads without the forward legs obstructing access.

Job-Site Material Staging

The forklift pockets and horizontal transport mode allow the JML-12X to be moved between floors or staging areas by forklift, making it practical for multi-story construction projects where the lift needs to be repositioned frequently.

Compatible Materials

• Drywall sheets and ceiling panels
• HVAC units and ductwork sections
• Electrical conduit bundles and junction boxes
• Mechanical components and air handlers
• General construction materials up to 650 lbs at a 14 in. load center
• Extended loads up to 175 lbs at a 42 in. load center (with fork extensions)

Product Documents

• JML-24X/18X/12X Operating Instructions & Parts Manual
• JML-24X/18X/12X Service Manual

Safety Data Summary

Hazard Information

• Tip-over hazard if load exceeds rated capacity or is not centered, balanced, and secured on the forks
• Tip-over hazard if counterbalance lift mode is used without the JET counterbalance weight assembly
• Electrical hazard — lift is not insulated from electrical current; contact with energized power lines can cause severe injury or death
• Fall hazard — do not use to lift, lower, support, or transport people; do not stand on load forks or climb on the mast
• Crush/pinch hazard from folding legs, mast sections, winch, cable, and lifting forks
• Cable failure hazard if cable is kinked, frayed, worn, or damaged — replace before use with factory replacement cable only
• Do not operate in strong or gusty winds, during storms, or if lightning is in the area
• Prop 65 Warning: Cancer and Reproductive Harm

Personal Protective Equipment

• Hard hat
• Safety glasses
• Steel-toe shoes
• Gloves

Safe Handling

• Use only on solid and level surfaces that can withstand the weight of the lift and load
• Do not use on inclines or moving surfaces
• Extend and lock stabilizer legs and lock all casters before raising a load
• Always leave at least five wraps of cable on the winch drum
• Do not use a drill rated above 1,400 in-lbs of torque when operating the winch with a drill
• Do not move the lift to a different location while a load is attached and elevated
• Do not leave the lift unattended with a load elevated
• Maintain safe distance from electrical power lines in accordance with OSHA Standard 1926.1408
• Use proper lifting practices and multiple people when raising or lowering the mast assembly to or from horizontal transport mode
• Inspect the lift and cable for damage prior to each use; perform non-load operation tests before each use

Frequently Asked Questions

Q: What is the maximum lift height of the JML-12X?
A: With forks mounted up on the carriage, the maximum lift height is 13 ft., 1 in. With forks mounted down, the maximum lift height is 11 ft., 4 in.

Q: Can I use any drill to power the winch?
A: The winch accepts a 3/4 in. 6-point socket for drill input. Do not use a drill rated above 1,400 in-lbs of torque, as excessive torque can cause cable breakage. Maximum no-load input speed is 500 RPM.

Q: What is the maximum load capacity, and does it change with load position?
A: Yes — capacity is 650 lbs at a 14 in. load center, 430 lbs at a 24 in. load center, and 175 lbs at a 42 in. load center when using fork extensions.

Q: Can the JML-12X be used near a wall or obstruction?
A: Yes. The Counterbalance Lift Mode orients the legs to the rear, allowing the operator to position and lift loads close to a forward wall. This mode requires the JET counterbalance weight assembly — no substitute counterweight is permitted.

Q: How is the JML-12X moved around a job site?
A: The unit rolls on casters for short moves. For longer repositioning, integrated forklift pockets (5.75 x 1.75 in. internal dimensions) allow a forklift to pick up and move the unit when it is in horizontal transport mode.

Q: What happens if the cable breaks while the lift is under load?
A: The mast safety brake system activates automatically to prevent an uncontrolled drop. The brakes must be reset following the procedure in Section 6.7 of the Operating Instructions and Parts Manual before the lift can be returned to service.